Solar cell panel optimizer and energy conversion device
By introducing power switching circuits and current sampling circuits into the solar panel system and using a controller to regulate the current, the problem of inconsistent current caused by uneven illumination is solved, resulting in higher power generation efficiency and reliability.
Patent Information
- Application Number
- CN202520100899.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-16
- Publication Date
- 2026-01-02
- Estimated Expiration
- 2035-01-16
AI Technical Summary
Existing solar panels generate inconsistent power under uneven sunlight conditions, affecting overall power generation efficiency.
The solar panel optimizer includes a power switching circuit, a current sampling circuit, and a controller. The controller controls the power switching circuit and the current sampling circuit to adjust the current to keep it within the set value range and avoid current inconsistency.
This effectively avoids inconsistent output current of solar panels under uneven lighting conditions, improves the safety and reliability of solar panels, and maximizes power generation.
Smart Images
Figure CN223758183U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to electronic control equipment technical field especially is related to a solar cell panel optimizer and energy conversion equipment. BACKGROUND
[0002] Solar cell panel can convert light energy into electric energy and store up, and release to supply for power system or other device uses when needing the device. The role of solar cell panel optimizer is to balance the difference between the power generation of solar cell panel due to different illumination, improve the stability and reliability of solar cell panel. Maximize the excess energy of renewable energy power generation equipment, so as to release during the energy demand peak or provide power in emergency as standby power supply.
[0003] Conventional solar cell panel adopts direct connection control mode, due to the uneven illumination, the phenomenon of inconsistent power generation appears between each solar cell panel, when multiple solar cell panels work in series, the overall power generation is seriously affected, and the overall power generation efficiency is lowered. SUMMARY
[0004] The utility model discloses a solar cell panel optimizer and energy conversion equipment to overcome the above technical inadequacy, solve the uneven power generation of the existing solar cell panel, the technical problem of maximum efficiency of improving the overall solar system power generation.
[0005] To achieve the above technical purpose, first, the utility model discloses a solar cell panel optimizer, comprising:
[0006] Input terminal A, input terminal C, output terminal B, output terminal D, power switch circuit, current sampling circuit and controller;
[0007] The input end of the power switch circuit is electrically connected with the input terminal A, and the output end of the power switch circuit is electrically connected with the output terminal B;
[0008] The input end of the current sampling circuit is electrically connected with the input terminal C, and the output end of the current sampling circuit is electrically connected with the output terminal D;
[0009] The controller is provided with pin 1, pin 2, pin 3, pin 4, a plurality of pin G, enable signal pin EN and ground pin GND, the pin 1 is electrically connected with the input terminal A, the pin 2 is electrically connected with the input terminal C, the pin 3 is electrically connected with the output terminal D, the pin 4 is electrically connected with the output terminal B, all the pin G is electrically connected with the power switch circuit, and the enable signal pin EN is used to accept enable signal.
[0010] Compared with the prior art, the utility model have beneficial effects include:
[0011] The solar cell panel optimizer disclosed by the utility model increases power switch circuit, current sampling circuit and controller on the basis of conventional energy conversion equipment, and can realize the on-off control of the two circuits through the controller controlling the power switch circuit and the current sampling circuit, because the controller is provided with an enable signal pin EN, when the controller receives an enable signal (EN signal for short), the power switch circuit is turned on, the input end A and the output end B pass through the energy conversion of the power switch circuit, output loop current is generated, with the lapse of time, the current of the power switch circuit in the current sampling circuit increases, when the current increases to a set value, the controller automatically adjusts the duty cycle of the power switch circuit, so that the current sampling value is reduced, the control process is repeated, so that the current is fixed in the set value range, therefore, the phenomenon that the output current of the solar cell panel is inconsistent under the condition of uneven illumination is avoided, on the contrary, when the EN signal disappears, the power switch circuit is turned off.
[0012] In a possible implementation, the power switch circuit comprises a plurality of field effect tubes Q and an inductor L;
[0013] The plurality of field effect tubes Q form a branch through series connection, in the branch, the drain of the first field effect tube Q is electrically connected with the input end A, the source of the last field effect tube Q is grounded, the source of the previous field effect tube Q is electrically connected with the drain of the next field effect tube Q, and the gates of all the field effect tubes Q are electrically connected with the pin G provided on the controller in a one-to-one manner;
[0014] One end of the inductor L is electrically connected with the source of one of the field effect tubes Q, and the other end of the inductor L is electrically connected with the output end B;
[0015] Further, when the controller receives the EN signal, all the field effect tubes Q of the power switch circuit work, so that the input end A and the output end B can pass through the energy conversion of the power switch circuit to generate output loop current.
[0016] In a possible implementation, all the field effect tubes Q are N-channel enhancement mode field effect tubes, so that fast switching action can be realized, and the thermal resistance is small.
[0017] In a possible implementation, the inductor L is a patch type power inductor, so that the volume of the inductor is small, the inductance is large, the space occupation can be reduced, and the energy storage efficiency can be improved.
[0018] In a possible implementation, the current sampling circuit is a circuit structure formed by a plurality of current sampling resistors R in parallel; this scheme can reduce the total energy consumption of the resistors, and the resistors can independently sense the current change, thereby ensuring that the controller automatically adjusts the duty cycle of the power switching circuit.
[0019] In a possible implementation, all the current sampling resistors R in the current sampling circuit are patch resistors; this scheme can reduce the resistor footprint.
[0020] In a possible implementation, the current sampling circuit is a circuit structure formed by a plurality of current sampling resistors R1 in series; this scheme can sense the current change through the resistors, thereby ensuring that the controller automatically adjusts the duty cycle of the power switching circuit.
[0021] In a possible implementation, all the current sampling resistors R1 in the current sampling circuit are patch resistors.
[0022] In a second aspect, the utility model provides a photoelectric energy conversion equipment, including above-mentioned solar cell panel optimizer. BRIEF DESCRIPTION OF DRAWINGS
[0023] Figure 1 It is the circuit simplification drawing of the solar cell panel optimizer disclosed in the utility model embodiment. DETAILED DESCRIPTION
[0024] First, those skilled in the art should understand that these embodiments are only used to explain the technical principles of the embodiments of the application, and are not intended to limit the protection scope of the embodiments of the application. Those skilled in the art can adjust them as needed to adapt to specific application occasions.
[0025] In the description of the embodiments of the application, it should be explained that, unless otherwise explicitly specified and limited, the terms "electrically connected", "electrically connected relationship" should be understood broadly, that is, it refers to the connection mode with electrical relationship, for example, it can be through the conductive wire to realize the circuit connection, or through the wireless signal channel (channel) to realize the electric connection, or the combination of the two. In addition, "electrically connected", "electrically connected relationship" can be based on mechanical connection (such as conductive wire arranged in the connecting key); it can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the application can be understood according to the specific circumstances.
[0026] The technical scheme of the utility model will be described clearly below with reference to the drawings.
[0027] Referring to Figure 1 The embodiments disclose a photoelectric energy conversion equipment, which comprises a solar cell panel optimizer,Figure 1 is a circuit diagram of the solar panel optimizer disclosed in the present embodiment. As shown in Figure 1 , the solar panel optimizer comprises an input terminal A, an input terminal C, an output terminal B, an output terminal D, a power switch circuit, a current sampling circuit and a controller; the input terminal of the power switch circuit is electrically connected with the input terminal A, and the output terminal of the power switch circuit is electrically connected with the output terminal B; the input terminal of the current sampling circuit is electrically connected with the input terminal C, and the output terminal of the current sampling circuit is electrically connected with the output terminal D.
[0028] In the solar panel optimizer, the controller is an auxiliary control device with MCU (single-chip microcomputer) as the core, which is used to adjust the signal duty cycle of the power switch circuit. The controller is provided with a pin 1, a pin 2, a pin 3, a pin 4, a plurality of pins G, an enable signal pin EN and a ground pin GND. The pin 1 is electrically connected with the input terminal A, the pin 2 is electrically connected with the input terminal C, the pin 3 is electrically connected with the output terminal D, the pin 4 is electrically connected with the output terminal B, and all the pins G are electrically connected with the power switch circuit. The enable signal pin EN is used to receive an enable signal (abbreviated as EN signal). The plurality of pins G provided on the controller are denoted as G1, G2,..., Gn. Figure 1 Two pins G, i.e. G1 and G2, are drawn.
[0029] Please continue to refer to Figure 1 In the solar panel optimizer, the power switch circuit comprises a plurality of field effect tubes Q and an inductor L. The plurality of field effect tubes Q are denoted as Q1, Q2,..., Qn. Figure 1 Two field effect tubes Q1 and Q2 are drawn. The plurality of field effect tubes (Q1-Qn) form a branch by being connected in series. In the branch, the drain of the field effect tube Q1 at the first position is electrically connected with the input terminal A, and the source of the field effect tube Qn at the end is grounded. The source of the field effect tube Q (s-1) is electrically connected with the drain of the field effect tube Qs. In addition, the gates of all the field effect tubes (Q1-Qn) are electrically connected with the pins G (G1-Gn) provided on the controller in a one-to-one manner. One end of the inductor L is electrically connected with the source of one of the field effect tubes Q, and the other end of the inductor L is electrically connected with the output terminal B. In the present embodiment, one end of the inductor L is electrically connected with the source of the field effect tube Q1.
[0030] Please continue to refer to Figure 1 In the power switch circuit, all the field effect tubes Q are N-channel enhancement mode field effect tubes, and the model thereof can be AGM405A. The inductor L is a patch power inductor. The inductor L used in the present embodiment is a patch inductor with a saturation current of 30A, an inductance of 10uH and a magnetic core type of PQ2615.
[0031] Please continue to refer to Figure 1In the solar panel optimizer, the current sampling circuit is a circuit structure formed by a plurality of current sampling resistors R in parallel, and all the current sampling resistors R in the current sampling circuit are patch resistors. The brand of the current sampling resistor R used in the embodiment is milliohm, the package patch size is 2512, the power is 2W, and the value is 1 milliohm.
[0032] Of course, the current sampling circuit can also be a circuit structure formed by a plurality of current sampling resistors R1 in series. All the current sampling resistors R1 in the current sampling circuit are patch resistors.
[0033] The energy conversion device disclosed in the embodiment, the solar panel optimizer in the energy conversion device, adds a power switching circuit, a current sampling circuit and a controller on the basis of a conventional energy converter. The controller is an auxiliary control device with a single-chip microcomputer as the core. Only the control program needs to be written in the controller in advance. When the controller receives an EN signal, the field effect transistor (Q1-Qn) of the power switching circuit works, the input end A and the output end B generate an output through the working of the power switching circuit, thereby generating a loop current. With the passage of time, the current of the current sampling resistor (R or R1) increases. When the set value is reached, the voltage of the resistance of the current sampling circuit rises, thereby controlling the duty cycle of the field effect transistor of the power switching circuit, so that the current returns to the specified value. Therefore, the phenomenon that the output current of the solar panel is inconsistent under uneven illumination is avoided. On the contrary, when the EN signal disappears, the power switching circuit stops working and the output is closed.
[0034] The solar panel optimizer of the embodiment can effectively avoid the phenomenon that the output current of the solar panel is inconsistent under uneven illumination, improve the safety and reliability of the solar panel and maximize the power generation, and can also realize reliable operation under the high-voltage circuit of series output, and has good practical value.
[0035] The embodiments of the utility model are described in detail above in combination with the drawings, but the utility model is not limited to the above-mentioned embodiments, and various changes can be made within the knowledge range possessed by ordinary skilled persons in the technical field without departing from the purpose of the utility model.
[0036] The specific implementation mode of the utility model described above does not constitute a limitation on the protection scope of the utility model. Any various other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the utility model claim.
Claims
1. A solar panel optimizer, characterized in that, The utility model relates to a solar cell panel optimizer, comprising: an input terminal A, an input terminal C, an output terminal B, an output terminal D, a power switch circuit, a current sampling circuit and a controller; an input terminal of the power switch circuit is electrically connected with the input terminal A, and an output terminal of the power switch circuit is electrically connected with the output terminal B; an input terminal of the current sampling circuit is electrically connected with the input terminal C, and an output terminal of the current sampling circuit is electrically connected with the output terminal D; a plurality of pins G, an enable signal pin EN and a ground pin GND are arranged on the controller, the pin 1 is electrically connected with the input terminal A, the pin 2 is electrically connected with the input terminal C, the pin 3 is electrically connected with the output terminal D, the pin 4 is electrically connected with the output terminal B, all the pins G are electrically connected with the power switch circuit, and the enable signal pin EN is used for accepting an enable signal.
2. The solar panel optimizer of claim 1, wherein, The power switch circuit comprises a plurality of field effect tubes Q and an inductor L. The plurality of field effect tubes Q form a branch by being connected in series, in the branch, a drain of a first field effect tube Q is electrically connected with the input terminal A, a source of a last field effect tube Q is grounded, a source of a previous field effect tube Q is electrically connected with a drain of a next field effect tube Q, and all the gates of the field effect tubes Q are electrically connected with the pins G arranged on the controller in a one-to-one manner. One end of the inductor L is electrically connected with a source of one of the field effect tubes Q, and the other end of the inductor L is electrically connected with the output terminal B.
3. The solar panel optimizer of claim 2, wherein, All the field effect tubes Q are N-channel enhancement mode field effect tubes.
4. The solar panel optimizer of claim 3, wherein, The inductor L is a patch type power inductor.
5. The solar panel optimizer of any one of claims 1-4, wherein, The current sampling circuit is a circuit structure formed by a plurality of current sampling resistors R connected in parallel.
6. The solar panel optimizer of claim 5, wherein, All the current sampling resistors R in the current sampling circuit are patch resistors.
7. The solar panel optimizer of any one of claims 1-4, wherein, The current sampling circuit is a circuit structure formed by a plurality of current sampling resistors R1 connected in series.
8. The solar panel optimizer of claim 7, wherein, All the current sampling resistors R1 in the current sampling circuit are patch resistors.
9. An opto-electric energy conversion device, characterized by, The utility model relates to a solar cell panel optimizer, comprising: an input terminal A, an input terminal C, an output terminal B, an output terminal D, a power switch circuit, a current sampling circuit and a controller; an input terminal of the power switch circuit is electrically connected with the input terminal A, and an output terminal of the power switch circuit is electrically connected with the output terminal B; an input terminal of the current sampling circuit is electrically connected with the input terminal C, and an output terminal of the current sampling circuit is electrically connected with the output terminal D; a plurality of pins G, an enable signal pin EN and a ground pin GND are arranged on the controller, the pin 1 is electrically connected with the input terminal A, the pin 2 is electrically connected with the input terminal C, the pin 3 is electrically connected with the output terminal D, the pin 4 is electrically connected with the output terminal B, all the pins G are electrically connected with the power switch circuit, and the enable signal pin EN is used for accepting an enable signal. The power switch circuit comprises a plurality of field effect tubes Q and an inductor L;